August Twenty Sixth
(What’s That, Five Days Belated?)
Prompt: Which RPG Provides The Most Useful Resources?
Hm. There’s a lot of good answers here, depending on how you define “resources”.
Pathfinder probably has the largest bulk of both official and third party material. (There’s a lot of high-quality stuff in the latter category, and a lot of low quality. See Sturgeon’s Law.)
GURPS Third Edition has a well-deserved reputation for mountains of excruciatingly well-written and well-researched sourcebooks that contain tons of ideas and information applicable to other gaming system. GURPS Fourth Edition has less material per se, but the majority of the 3E stuff is usable for the non-rules content and the rules content is easy to convert.
I am extremely impressed with the “Doctor” sourcebooks for the Doctor Who RPG. Each volume covers an individual Doctor’s tenure, with stats for anything that needs it and plot hooks for each episode summarized.